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rt-thread-official/bsp/nuvoton/libraries/m480/rtt_port/drv_emac.c

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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-2-7 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#if defined(BSP_USING_EMAC)
#if defined(RT_USING_LWIP)
#include <rtdevice.h>
#include <NuMicro.h>
#include <netif/ethernetif.h>
#include <netif/etharp.h>
#include <lwip/icmp.h>
#include "lwipopts.h"
#include "drv_pdma.h"
/* Private define ---------------------------------------------------------------*/
// RT_DEV_NAME_PREFIX e
#if !defined(NU_EMAC_PDMA_MEMCOPY)
#define NU_EMAC_PDMA_MEMCOPY
#endif
#if !defined(NU_EMAC_PDMA_MEMCOPY_THRESHOLD)
#define NU_EMAC_PDMA_MEMCOPY_THRESHOLD 128
#endif
#define NU_EMAC_DEBUG
#if defined(NU_EMAC_DEBUG)
// #define NU_EMAC_RX_DUMP
// #define NU_EMAC_TX_DUMP
#define NU_EMAC_TRACE rt_kprintf
#else
#define NU_EMAC_TRACE(...)
#endif
#define NU_EMAC_TID_STACK_SIZE 256
/* Private typedef --------------------------------------------------------------*/
struct nu_emac
{
struct eth_device eth;
rt_uint8_t mac_addr[6];
struct rt_semaphore eth_sem;
};
typedef struct nu_emac *nu_emac_t;
/* Private functions ------------------------------------------------------------*/
#if defined(NU_EMAC_RX_DUMP) || defined(NU_EMAC_TX_DUMP)
static void nu_emac_pkt_dump(const char *msg, const struct pbuf *p);
#endif
#if LWIP_IPV4 && LWIP_IGMP
static err_t nu_igmp_mac_filter(struct netif *netif, const ip4_addr_t *ip4_addr, enum netif_mac_filter_action action);
#endif
static void nu_emac_halt(void);
static void nu_emac_reinit(void);
static void link_monitor(void *param);
static rt_err_t nu_emac_init(rt_device_t dev);
static rt_err_t nu_emac_open(rt_device_t dev, rt_uint16_t oflag);
static rt_err_t nu_emac_close(rt_device_t dev);
static rt_size_t nu_emac_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size);
static rt_size_t nu_emac_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size);
static rt_err_t nu_emac_control(rt_device_t dev, int cmd, void *args);
static rt_err_t nu_emac_tx(rt_device_t dev, struct pbuf *p);
static struct pbuf *nu_emac_rx(rt_device_t dev);
static rt_err_t rt_hw_nu_emac_register(char *dev_name);
static int rt_hw_nu_emac_init(void);
static void *nu_emac_memcpy(void *dest, void *src, unsigned int count);
/* Public functions -------------------------------------------------------------*/
/* Private variables ------------------------------------------------------------*/
static struct nu_emac nu_emac_dev = {0};
static struct rt_thread eth_tid;
static rt_uint8_t eth_stack[NU_EMAC_TID_STACK_SIZE];
#if defined(NU_EMAC_RX_DUMP) || defined(NU_EMAC_TX_DUMP)
static void nu_emac_pkt_dump(const char *msg, const struct pbuf *p)
{
rt_uint32_t i;
rt_uint8_t *ptr = p->payload;
NU_EMAC_TRACE("%s %d byte\n", msg, p->tot_len);
for (i = 0; i < p->tot_len; i++)
{
if ((i % 8) == 0)
{
NU_EMAC_TRACE(" ");
}
if ((i % 16) == 0)
{
NU_EMAC_TRACE("\r\n");
}
NU_EMAC_TRACE("%02x ", *ptr);
ptr++;
}
NU_EMAC_TRACE("\n\n");
}
#endif /* dump */
static void nu_emac_halt(void)
{
EMAC_DISABLE_RX();
EMAC_DISABLE_TX();
}
static void *nu_emac_memcpy(void *dest, void *src, unsigned int count)
{
#if defined(NU_EMAC_PDMA_MEMCOPY)
if (count >= NU_EMAC_PDMA_MEMCOPY_THRESHOLD)
return nu_pdma_memcpy(dest, src, count);
#endif
return memcpy(dest, src, count);
}
static void nu_emac_reinit(void)
{
rt_uint32_t EMAC_CAMxM[EMAC_CAMENTRY_NB];
rt_uint32_t EMAC_CAMxL[EMAC_CAMENTRY_NB];
rt_uint32_t EMAC_CAMEN;
// Backup MAC address.
EMAC_CAMEN = EMAC->CAMEN;
for (rt_uint8_t index = 0 ; index < EMAC_CAMENTRY_NB; index ++)
{
rt_uint32_t *CAMxM = (rt_uint32_t *)((rt_uint32_t)&EMAC->CAM0M + (index * 8));
rt_uint32_t *CAMxL = (rt_uint32_t *)((rt_uint32_t)&EMAC->CAM0L + (index * 8));
EMAC_CAMxM[index] = *CAMxM;
EMAC_CAMxL[index] = *CAMxL;
}
nu_emac_halt();
EMAC_Close();
EMAC_Open((uint8_t *)&nu_emac_dev.mac_addr[0]);
EMAC_ENABLE_TX();
EMAC_ENABLE_RX();
// Restore MAC address.
for (rt_uint8_t index = 0 ; index < EMAC_CAMENTRY_NB; index ++)
{
rt_uint32_t *CAMxM = (rt_uint32_t *)((rt_uint32_t)&EMAC->CAM0M + (index * 8));
rt_uint32_t *CAMxL = (rt_uint32_t *)((rt_uint32_t)&EMAC->CAM0L + (index * 8));
*CAMxM = EMAC_CAMxM[index];
*CAMxL = EMAC_CAMxL[index];
}
EMAC->CAMEN = EMAC_CAMEN;
}
#if LWIP_IPV4 && LWIP_IGMP
static err_t nu_igmp_mac_filter(struct netif *netif, const ip4_addr_t *ip4_addr, enum netif_mac_filter_action action)
{
rt_uint8_t mac[6];
int32_t ret = 0;
const uint8_t *p = (const uint8_t *)ip4_addr;
mac[0] = 0x01;
mac[1] = 0x00;
mac[2] = 0x5E;
mac[3] = *(p + 1) & 0x7F;
mac[4] = *(p + 2);
mac[5] = *(p + 3);
ret = EMAC_FillCamEntry((uint8_t *)&mac[0]);
if (ret >= 0)
{
NU_EMAC_TRACE("%s %s %s ", __FUNCTION__, (action == NETIF_ADD_MAC_FILTER) ? "add" : "del", ip4addr_ntoa(ip4_addr));
NU_EMAC_TRACE("%02X:%02X:%02X:%02X:%02X:%02X\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
}
return (ret >= 0) ? RT_EOK : -(RT_ERROR);
}
#endif /* LWIP_IPV4 && LWIP_IGMP */
static void link_monitor(void *param)
{
nu_emac_t psNuEMAC = (nu_emac_t)param;
uint32_t LinkStatus_Last = EMAC_LINK_DOWN;
EMAC_PhyInit();
while (1)
{
uint32_t LinkStatus_Current = EMAC_CheckLinkStatus();
/* linkchange */
if (LinkStatus_Last != LinkStatus_Current)
{
switch (LinkStatus_Current)
{
case EMAC_LINK_DOWN:
NU_EMAC_TRACE("Link status: Down\n");
break;
case EMAC_LINK_100F:
NU_EMAC_TRACE("Link status: 100F\n");
break;
case EMAC_LINK_100H:
NU_EMAC_TRACE("Link status: 100H\n");
break;
case EMAC_LINK_10F:
NU_EMAC_TRACE("Link status: 10F\n");
break;
case EMAC_LINK_10H:
NU_EMAC_TRACE("Link status: 10H\n");
break;
} /* switch( LinkStatus_Current ) */
/* Send link status to upper layer. */
if (LinkStatus_Current == EMAC_LINK_DOWN)
eth_device_linkchange(&psNuEMAC->eth, RT_FALSE);
else
eth_device_linkchange(&psNuEMAC->eth, RT_TRUE);
LinkStatus_Last = LinkStatus_Current;
} /* if ( LinkStatus_Last != LinkStatus_Current ) */
rt_thread_delay(RT_TICK_PER_SECOND);
} /* while(1) */
}
static rt_err_t nu_emac_init(rt_device_t dev)
{
nu_emac_t psNuEMAC = (nu_emac_t)dev;
EMAC_Close();
EMAC_Open((uint8_t *)&psNuEMAC->mac_addr[0]);
EMAC_ENABLE_RX();
EMAC_ENABLE_TX();
NVIC_SetPriority(EMAC_TX_IRQn, 1);
NVIC_EnableIRQ(EMAC_TX_IRQn);
NVIC_SetPriority(EMAC_RX_IRQn, 1);
NVIC_EnableIRQ(EMAC_RX_IRQn);
rt_sem_init(&psNuEMAC->eth_sem, "eth_sem", 0, RT_IPC_FLAG_FIFO);
rt_thread_init(&eth_tid, "eth", link_monitor, (void *)psNuEMAC, eth_stack, sizeof(eth_stack), RT_THREAD_PRIORITY_MAX - 2, 10);
rt_thread_startup(&eth_tid);
#if defined(LWIP_IPV4) && defined(LWIP_IGMP)
netif_set_igmp_mac_filter(psNuEMAC->eth.netif, nu_igmp_mac_filter);
#endif /* LWIP_IPV4 && LWIP_IGMP */
return RT_EOK;
}
static rt_err_t nu_emac_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t nu_emac_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_size_t nu_emac_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
{
rt_set_errno(-RT_ENOSYS);
return 0;
}
static rt_size_t nu_emac_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
rt_set_errno(-RT_ENOSYS);
return 0;
}
static rt_err_t nu_emac_control(rt_device_t dev, int cmd, void *args)
{
nu_emac_t psNuEMAC = (nu_emac_t)dev;
switch (cmd)
{
case NIOCTL_GADDR:
/* Get MAC address */
if (args)
rt_memcpy(args, &psNuEMAC->mac_addr[0], 6);
else
return -RT_ERROR;
break;
default :
break;
}
return RT_EOK;
}
static rt_err_t nu_emac_tx(rt_device_t dev, struct pbuf *p)
{
nu_emac_t psNuEMAC = (nu_emac_t)dev;
struct pbuf *q;
rt_uint32_t offset = 0;
rt_uint8_t *buf = (rt_uint8_t *)EMAC_ClaimFreeTXBuf();
/* Get free TX buffer */
if (buf == RT_NULL)
{
rt_sem_control(&psNuEMAC->eth_sem, RT_IPC_CMD_RESET, 0);
EMAC_CLEAR_INT_FLAG(EMAC, EMAC_INTSTS_TXCPIF_Msk);
EMAC_ENABLE_INT(EMAC, EMAC_INTEN_TXCPIEN_Msk);
do
{
rt_sem_take(&psNuEMAC->eth_sem, 1);
buf = (rt_uint8_t *)EMAC_ClaimFreeTXBuf();
}
while (buf == RT_NULL);
}
for (q = p; q != NULL; q = q->next)
{
rt_uint8_t *ptr;
rt_uint32_t len;
len = q->len;
ptr = q->payload;
nu_emac_memcpy(&buf[offset], ptr, len);
offset += len;
}
#if defined(NU_EMAC_TX_DUMP)
nu_emac_pkt_dump("TX dump", p);
#endif
/* Return SUCCESS */
return (EMAC_SendPktWoCopy(offset) == 1) ? RT_EOK : RT_ERROR;
}
static struct pbuf *nu_emac_rx(rt_device_t dev)
{
struct pbuf *p = RT_NULL;
uint8_t *pu8DataBuf = NULL;
unsigned int avaialbe_size;
if ((avaialbe_size = EMAC_GetAvailRXBufSize(&pu8DataBuf)) > 0)
{
/* Allocate RX packet buffer. */
p = pbuf_alloc(PBUF_RAW, avaialbe_size, PBUF_RAM);
if (p != RT_NULL)
{
RT_ASSERT(p->next == RT_NULL);
nu_emac_memcpy((void *)p->payload, (void *)pu8DataBuf, avaialbe_size);
#if defined(NU_EMAC_RX_DUMP)
nu_emac_pkt_dump("RX dump", p);
#endif
}
else
{
NU_EMAC_TRACE("Can't allocate memory for RX packet.(%d)\n", avaialbe_size);
}
/* Update RX descriptor */
EMAC_RecvPktDoneWoRxTrigger();
} // if ( (avaialbe_size= EMAC_GetAvaiableRXBufSize()) > 0 )
else
{
/* No avaiable RX packet, we enable RXGD/RDUIEN interrupts. */
if (!(EMAC->INTEN & EMAC_INTEN_RDUIEN_Msk))
{
EMAC_CLEAR_INT_FLAG(EMAC, (EMAC_INTSTS_RDUIF_Msk | EMAC_INTSTS_RXGDIF_Msk));
EMAC_ENABLE_INT(EMAC, (EMAC_INTEN_RDUIEN_Msk | EMAC_INTEN_RXGDIEN_Msk));
}
else
{
EMAC_CLEAR_INT_FLAG(EMAC, EMAC_INTSTS_RXGDIF_Msk);
EMAC_ENABLE_INT(EMAC, EMAC_INTEN_RXGDIEN_Msk);
}
EMAC_TRIGGER_RX();
} //else
return p;
}
void EMAC_RX_IRQHandler(void)
{
/* Enter interrupt */
rt_interrupt_enter();
/* No RX descriptor avaiable, we need to get data from RX pool */
if (EMAC_GET_INT_FLAG(EMAC, EMAC_INTSTS_RDUIF_Msk))
{
EMAC_DISABLE_INT(EMAC, (EMAC_INTEN_RDUIEN_Msk | EMAC_INTEN_RXGDIEN_Msk));
eth_device_ready(&nu_emac_dev.eth);
}
/* A good packet ready. */
else if (EMAC_GET_INT_FLAG(EMAC, EMAC_INTSTS_RXGDIF_Msk))
{
EMAC_DISABLE_INT(EMAC, EMAC_INTEN_RXGDIEN_Msk);
eth_device_ready(&nu_emac_dev.eth);
}
/* Receive Bus Error Interrupt */
if (EMAC_GET_INT_FLAG(EMAC, EMAC_INTSTS_RXBEIF_Msk))
{
NU_EMAC_TRACE("Reinit Rx EMAC\n");
EMAC_CLEAR_INT_FLAG(EMAC, EMAC_INTSTS_RXBEIF_Msk);
nu_emac_reinit();
}
/* Leave interrupt */
rt_interrupt_leave();
}
void EMAC_TX_IRQHandler(void)
{
/* Enter interrupt */
rt_interrupt_enter();
unsigned int status = EMAC->INTSTS;
/* Wake-up suspended process to send */
if (EMAC_GET_INT_FLAG(EMAC, EMAC_INTSTS_TXCPIF_Msk))
{
EMAC_DISABLE_INT(EMAC, EMAC_INTEN_TXCPIEN_Msk);
rt_sem_release(&nu_emac_dev.eth_sem);
}
if (EMAC_GET_INT_FLAG(EMAC, EMAC_INTSTS_TXBEIF_Msk))
{
NU_EMAC_TRACE("Reinit Tx EMAC\n");
EMAC->INTSTS = EMAC_INTSTS_TXBEIF_Msk;
EMAC_CLEAR_INT_FLAG(EMAC, EMAC_INTSTS_TXBEIF_Msk);
nu_emac_reinit();
}
else
EMAC_SendPktDone();
/* Leave interrupt */
rt_interrupt_leave();
}
static rt_err_t rt_hw_nu_emac_register(char *dev_name)
{
rt_uint32_t value = 0;
nu_emac_t psNuEMAC = (nu_emac_t)&nu_emac_dev;
/* Read UID from FMC */
SYS_UnlockReg();
FMC_Open();
for (rt_uint8_t i = 0; i < 3; i++)
{
value += FMC_ReadUID(i);
}
FMC_Close();
SYS_LockReg();
/* Assign MAC address */
psNuEMAC->mac_addr[0] = 0x82;
psNuEMAC->mac_addr[1] = 0x06;
psNuEMAC->mac_addr[2] = 0x21;
psNuEMAC->mac_addr[3] = (value >> 16) & 0xff;
psNuEMAC->mac_addr[4] = (value >> 8) & 0xff;
psNuEMAC->mac_addr[5] = (value) & 0xff;
NU_EMAC_TRACE("MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n", \
psNuEMAC->mac_addr[0], \
psNuEMAC->mac_addr[1], \
psNuEMAC->mac_addr[2], \
psNuEMAC->mac_addr[3], \
psNuEMAC->mac_addr[4], \
psNuEMAC->mac_addr[5]);
/* Register member functions */
psNuEMAC->eth.parent.init = nu_emac_init;
psNuEMAC->eth.parent.open = nu_emac_open;
psNuEMAC->eth.parent.close = nu_emac_close;
psNuEMAC->eth.parent.read = nu_emac_read;
psNuEMAC->eth.parent.write = nu_emac_write;
psNuEMAC->eth.parent.control = nu_emac_control;
psNuEMAC->eth.parent.user_data = RT_NULL;
psNuEMAC->eth.eth_rx = nu_emac_rx;
psNuEMAC->eth.eth_tx = nu_emac_tx;
/* Register eth device */
return eth_device_init(&nu_emac_dev.eth, dev_name);
}
static int rt_hw_nu_emac_init(void)
{
return rt_hw_nu_emac_register("e0");
}
INIT_APP_EXPORT(rt_hw_nu_emac_init);
#endif /* #if defined( RT_USING_LWIP ) */
#endif /* #if defined( BSP_USING_EMAC ) */
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